Outside Cresent the knife/gun hand
Against a straight punch, inside cresent the hand then, without olacing the foot down, hook kick to the temple
Block a side kick to the midsection/groin with my shin (actually did that in a match once, no break, but I limped for a week).

"Quiet fool before I am kicking the butt!"
-My three year old trash talking to me

"Integrity can't be bought or sold---you either have it or you don't."
-The Honky Tonk Man

"If you can't be a shining example, at least be a dire warning."
-My Father to me one day

Double knife hand strike to the nerves on the inside surface of the upper arm WHILE someone is throwing a haymaker at you with that arm. I laughed.

Deluxe247 tells it like it is:

you ninja fags just got owned in a bad way. this thread should go to the classics and mega thread forum due to the sheer size of taebo_master and gajusceaser's penis. (with which they just smacked across these ninja's faces)
from:

Haymaker defense: Karate chop the collar bone, breaking it. Grab the offending arm, straighten it out, and jerk it back and forth "into" their shoulder. The idea was that once you broke the collarbone, you could use the arm to stab them in the throat with their own clavicle.

i've seen a defense against a haymaker that is similar. as the guy throws it, you "answer the telephone", basically put your elbow up to protect your head. as you do that you punch the bicep of the incoming arm with the other hand. i dunn ohow well it works, but it hurt like hell when it was demonstrated on me, put my arm out for a minute or so.

Most of the hand techniques such as a spear hand depend on heavy conditioning of the hand. This is both impractical and very damaging to the hand. I have seen people break boards with a spear. That in it self does not prove any thing other then it is possible to use the hand in that manner. There are better ways to attack that target area. It is possible to make almost any thing work if you are very lucky and catch the opponent by surprise. I sure would not bet my life on any of the techniques above.
I was taught a spear hand to the solar plexus. Avery good way to break your fingers. The thing was we were never told that you needed to condition you hand for 15 or 20 years to have any chance of working.

If you do 'answer the telephone' make sure that haymaker isn't a feint, because that block leaves your torso wide open. I took a couple of roundhouse kicks to the ribs one day before that one sunk into my brain. . .

"I had once talked to Billy Conn, the boxer, about professionals versus amateurs - specifically street fighters. One had always heard rumors of champions being taken out by back-alley fighters. Conn was scornful. "Aw, it's like hitting a girl," he said. "They're nothing."